Ask Honest John

Most recently answered battery drain questions
Which is the best car for short journeys? My Ford Puma isn’t apparently driven enough to recharge so twice the battery has drained in the eight months I’ve had it. I need something comfortable, big enough...
I have just taken delivery of my Kia Niro PHEV. I have a wallbox charger and intend to top up the battery each night so I have 100 per cent charge for local trips. Will this damage the battery?
When I collected my new lease car last October the salesman told me not to leave the doors or boot open as it would trigger the low battery warning. I had not noticed this on my test drive and the dealership...
My daughter has a 2009 Honda CR-V 2.2 Diesel. Every few weeks the battery goes completely dead and the car has to be jump-started. The local garage cannot find the reason. The battery is only a few months...
What's the ticking noise behind the dashboard when I turn the ignition? The car is a Volvo S40.
Is there a problem with the battery in my 2017 Discovery? It's losing voltage when left parked for two weeks.
The battery in my BMW has failed after 24,000 miles and the car is still in warranty. As an experienced driver, I've made sure the car has had regular runs of 20 minutes or more. BMW says there is no warranty...
Yesterday our Toyota C-HR would not start because the auxiliary battery was completely discharged. The breakdown service started the car and I took it on a 30-minute journey to recharge the aux battery....
If I take my car for a decent motorway run to charge battery, do you have any advice about speeds, gears, putting heaters on etc?
What type of battery charger do I need for my BMW 218 Tourer? It's not being used much and the flat battery light keeps appearing.